Measure of integrity and percentages of involvement in the activation of WM bundles for the three groups.

The percentages over 5% in at least one group are reported. For each group, the percentages of involvement were computed superimposing the ensemble tract to the atlases of the WM fiber bundles and represent the number of overlapping voxels between the two, with respect to the number of voxels of the atlas. Abbreviations: WM = white matter; HC = healthy controls; aMCI = amnestic mild cognitive impairment; AD = Alzheimer's disease; FA = fractional anisotropy; SD = standard deviation; CB = cingulum bundle; AF = arcuate fasciculus; CC = corpus callosum; sup = superior; par = parietal; post = posterior; temp = temporal.(*)The average FA was found to be significantly different between AD and HC (p(#)The average FA was found to be significantly different between aMCI and AD (p